The StackModel class will do the job (provided by org.jrebirth.af:component artifact), you can find 2 usages here and here.

Each ‘card’ model can be called using a enum|modelKey identifier, and each stack has an unique name.

The first sample is used for the JRebirth Demo Application, it’s a pretty simple application that will allow to display other JRebirth showcase applications dynamically loaded as JRebirth module (from a separate and independent jar).